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==Self-assessment quizzes==
*[https://www.cdc.gov/csels/dsepd/ss1978/index.html CDC Principles of Epidemiology]
*[https://www.med.soton.ac.uk/stats_eLearning/quizzes/index.html Statistics - University of Southampton]
*[https://collegedunia.com/exams/statistics-mcq-mathematics-articleid-4505]
==Types of variable==
flowchart TB
a[Variable]
b[*Quantitative<br>*Numerical] c[*Categorical<br>*Nominal]
d[Continuous]
e[Discrete<br>Integer]
c --- f & g & h
}}
* *Quantitative/numerical variable is also called as '''covariate''' when it is an explanatory (independent) variable
* *Categorical/nominal variable is also called as '''factor''' when it is an explanatory (independent) variable
==Ratio, Rate, Proportion==
a -- ratio of quantity in time-scale ---c[Rate]
}}
==Probability, Likelihood==
--> ''see'' [[Data distribution#Probability, Likelihood|'Probability, Likelihood' in 'Data distribution']]
==Origin of terminology==
In a figure Verhulst described an usual exponential curve as "''logarithmique''", and created a new word "''logistique''" to describe a distinct curve he created by his formula which is now known as a logistic regression formula, but he didn't note through what derivation he created the word.
Description of [https://en.wikipedia.org/wiki/Logistic_function#History Logistic function in Wikipedia is here].
At least, it seems to have nothing to do with a general term "logistics".
